| Abbreviation | Definition |
|---|---|
| QSAD | Quantum Sufficit Ad ("as much as is sufficient") |
| QW | Four times a Week |
| R | combined hormonal vaginal ring |
| R | rectal |
| R-CHOP | retuximab, cyclophosphamide, doxorubicin, vincristine, and prednisone |
| REC'S | Recommendations |
| rep.,rept. | repetatur - repeats |
| R-FC | retuximab, fludarabine, and cyclophosphamide |
| RFD(S) | reference dose(s) |
| RL,R/L | Ringer's lactate |
| RPH | Registered Pharmacist/ Government Licensed |
| RPh | Registered, Licensed Pharmacist |
| RPOS | Repeat Prescription Ordering Scheme |
| RSD(s) | risk-specific dose(s) |
| RTD | return to duty |
| RTUF | ready-to-use therapeutic food |
| RUTF | ready-to-use therapeutic food |
| Rx | take (Lat. recipe] |
| s | sine - without (usually written with a bar on top of the "s") |
| s.a. | secundum artum - use your judgement |